VCO tuning on startup- uninterrupted??

I'm playing a show tomorrow and am looking for advice on how to let my two analog synths (Moog mother and Doepfer dark energy) properly tune.

I've read they need about 30 minutes to settle. Does this have to be uninterrupted? So I power up the synth on stage and wait 30 minutes? Not gona make many friends like that.

Or can I let them warm up off stage, power down and move them on stage then power back up? Sorta like a tube amp?